>3tt6D (D:) observed residues (from ATOM records)
iysrllkdriimlgsaiddnvansivsqllflaaedpekeislyinspggsitagmaiyd
tmqfikpkvsticigmaasmgafllaagekgkryalpnsevmihqpeiaakrilllrdkl
nkvlaertgqplevierdtdrdnfksaeealeyglidkilth